Rust marks behind my graphics card

Nishant Pradhan

Honorable
Mar 23, 2013
4
0
10,510
I have a 1 year old graphics card and today when I opened my cpu cabinet I saw some rust marks on the back side of my card.
I don't know why did it happen and does this affect the performance of my card? because in almost every games i get some shadow and rendering problems.
My card is GTX 650 ti, 500w PSU, i3-2120 3.3 GHz.
Lenovo h420 PC